bad.domain		554 match bad.domain
friend.bad.domain	OK
bad-sender@		554 match bad-sender@
bad-sender@good.domain	OK
131.155.210		554 match 131.155.210
131.155.210.17		OK
reject@this.address	554 match reject@this.address
open_user@some.site	open
strict_user@some.site	strict
auth_client		123456
